ADTRAN 1200300L1, Руководство пользователя

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61200300L1-1 FXS+ Quad & Dual Voice Option Module User Manual 1-1
Chapter 1
Introduction
FXS+ QUAD AND DUAL VOICE OVERVIEW
The FXS Quad and FXS Dual Voice option modules can be
used with the ADTRAN TSU 100/120/600. The Quad FXS+
module provides four, 2-wire voice-grade interfaces serving
as the source of line-current and ringing voltage to a
telephone or station interface. The Dual FXS+ provides two,
2-wire voice-grade interfaces in either a plug-in or plug-on
module.
FXS+ Uses
The FXS+ may serve as the station-side of a foreign exchange
FXS/FXO application. It may be paired with another FXS+ to
provide a hotline or private line automatic ringdown (PLAR)
function to a remote location at the far end of the T-Span.
When the FXS+ is used in the tandem mode, it can be set to
accept phone service directly from a toll switch using E&M
signalling on the T-Span (e.g., 1-800 services, Megacom). It
may also be used to provide trunk services to a PBX from a
local switch. The FXS+ is intended for use in applications
where the 2-wire port wiring remains on premises.
The FXS+ option modules support Single Party and Universal
Voice Grade (UVG) Channel Unit Operation as specified by
TR-TSY-000008. The FXS+ module and a TSU 600/600e can
act as a remote terminal in a digital loop carrier application.
The FXS+ Dual plug-in option module also accepts the TSU
100/120/600 plug-on boards to provide up to four functional
ports per option slot used. Signalling and interfaces comply